import ruleTrigger from './ruleTrigger'
let someSpanIsNot24
let confGlobal

// template组装部分
export function vueTemplate(str) {
    return `<template>
        <div>
            ${str}
        </div>
    </template>`
}

// vueScript 组装vue script部分
export function vueScript(str) {
    return `<script>
        ${str}
    </script>`
}

// css组装
export function cssStyle(cssStr) {
    return `<style>
        ${cssStr}
    </style>`
}

// 构建form
function buildFormTemplate(scheme, child, type) {
    let labelPosition = ''
    // el-form中默认为右对齐 所以表单非右对齐需要赋值修改
    if(scheme.labelPosition !== 'right') {
      labelPosition = `label-position=${scheme.labelPosition}`
    }
    const disabled = scheme.disabled ? `:disabled="${scheme.disabled}"` : ''
    // 拼接el-form
    let str = `<el-form ref="${scheme.formRef}" :model="${scheme.formModel}" 
                :rules="${scheme.formRules}" :size="${scheme.size}" ${disabled} 
                label-width="${scheme.labelWidth}px" :label-position="${labelPosition}">
                  ${child}
                  ${buildFormBtns(scheme, type)}
                </el-form>`
    // span不是24 设置gutter间隔
    if (someSpanIsNot24) {
      str = `<el-row :gutter="${scheme.gutter}">
          ${str}
        </el-row>`
    }
    return str
}

// 构建表单保存 重置按钮
function buildFormBtns(scheme, type) {
  let str = ''
  if (scheme.formBtns && type === 'file') {
    str = `<el-form-item size="large">
          <el-button type="primary" @click="submitForm">提交</el-button>
          <el-button @click="resetForm">重置</el-button>
        </el-form-item>`
    if (someSpanIsNot24) {
      str = `<el-col :span="24">
          ${str}
        </el-col>`
    }
  }
  return str
}

const tags = {
    'el-button': el => {
        const { tag,disabled } = attrBuilder(el)
        const type = el.type ? `type="${el.type}"` : ''
        const icon = el.icon ? `icon="${el.icon}"` : ''
        const round = el.round ? 'round' : ''
        const size = el.size ? `size="${el.size}"` : ''
        const plain = el.plain ? 'plain' : ''
        const circle = el.circle ? 'circle' : ''
        let child = buildElButtonChild(el)
        if(child) child = `\n${child}\n`  // 换行
        return `<${tag} ${type} ${icon} ${round} ${size} ${plain} ${disabled} ${circle}>${child}</${tag}}`
    },
    'el-input': el => {
        const {tag,vModel, clearable, placeholder, width, disabled} = attrBuilder(el)
        // 其他属性
        const maxlength = el.maxlength ? `:malength="${el.maxlength}"`:''
        const showWordLimit = el['show-word-limit'] ? 'show-word-limit':''
        const readonly = el.readonly ? 'readonly' : ''
        const prefixIcon = el['prefix-icon'] ? `prefix-icon='${el['prefix-icon']}'` : ''
        const suffixIcon = el['suffix-icon'] ? `suffix-icon='${el['suffix-icon']}'` : ''
        const showPassword = el['show-password'] ? 'show-password' : ''
        const type = el.type ? `type = "${el.type}"` : ''
        const autosize = el.autosize && el.autosize.minRows 
            ? `:autosize="{minRows: ${el.autosize.minRows}, maxRows: ${el.autosize.maxRows}}"`
            : ''
        let child = buildElInputChild(el)
        if(child) child = `\n${child}\n`
        return `<${tag} ${vModel} ${type} ${placeholder} 
                ${maxlength} ${showWordLimit} ${readonly} 
                ${prefixIcon} ${suffixIcon} ${showPassword} ${autosize}
                ${clearable} ${width} ${disabled}>
                    ${child}
                </${tag}>` 
     },
     'el-input-number': el => {
         const {tag, vModel, disabled, placeholder} = attrBuilder(el)
         const max = el.max ? `:max="${el.max}"` : ''
         const min = el.min ? `:min="${el.min}"` : ''
         const precision = el.precision ? `:precision="${el.precision}"` : ''
         const controlsPosition = el['controls-position'] ? `:controls-position="${el.controls-position}"` : ''
         const stepStrictly = el['step-strictly'] ? `:step-strictly="${el.step-strictly}"` : ''
         return `<${tag} ${vModel} ${disabled} ${placeholder} ${max} ${min} ${precision} ${controlsPosition} ${stepStrictly}></${tag}>`
     },
     'el-select': el => {
         const {tag, disabled, vModel, clearable, placeholder, width} = attrBuilder(el)
         const filterable = el.filterable ? 'filterable' : ''
         const multiple = el.multiple ? 'multiple' : ''
         let child = buildElSelectChild(el)
         if (child) child = `\n${child}\n` // 换行
         return `<${tag} ${vModel} ${placeholder} ${disabled} ${multiple} ${filterable} ${clearable} ${width}>${child}</${tag}>`
     },
     'el-radio-group': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const size = `size="${el.size}"`
        let child = buildElRadioGroupChild(el)
    
        if (child) child = `\n${child}\n` // 换行
        return `<${tag} ${vModel} ${size} ${disabled}>${child}</${tag}>`
      },
      'el-checkbox-group': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const size = `size="${el.size}"`
        const min = el.min ? `:min="${el.min}"` : ''
        const max = el.max ? `:max="${el.max}"` : ''
        let child = buildElCheckboxGroupChild(el)
    
        if (child) child = `\n${child}\n` // 换行
        return `<${tag} ${vModel} ${min} ${max} ${size} ${disabled}>${child}</${tag}>`
      },
      'el-switch': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const activeText = el['active-text'] ? `active-text="${el['active-text']}"` : ''
        const inactiveText = el['inactive-text'] ? `inactive-text="${el['inactive-text']}"` : ''
        const activeColor = el['active-color'] ? `active-color="${el['active-color']}"` : ''
        const inactiveColor = el['inactive-color'] ? `inactive-color="${el['inactive-color']}"` : ''
        const activeValue = el['active-value'] !== true ? `:active-value='${JSON.stringify(el['active-value'])}'` : ''
        const inactiveValue = el['inactive-value'] !== false ? `:inactive-value='${JSON.stringify(el['inactive-value'])}'` : ''
    
        return `<${tag} ${vModel} ${activeText} ${inactiveText} ${activeColor} ${inactiveColor} ${activeValue} ${inactiveValue} ${disabled}></${tag}>`
      },
      'el-cascader': el => {
        const {
          tag, disabled, vModel, clearable, placeholder, width
        } = attrBuilder(el)
        const options = el.options ? `:options="${el.__vModel__}Options"` : ''
        const props = el.props ? `:props="${el.__vModel__}Props"` : ''
        const showAllLevels = el['show-all-levels'] ? '' : ':show-all-levels="false"'
        const filterable = el.filterable ? 'filterable' : ''
        const separator = el.separator === '/' ? '' : `separator="${el.separator}"`
    
        return `<${tag} ${vModel} ${options} ${props} ${width} ${showAllLevels} ${placeholder} ${separator} ${filterable} ${clearable} ${disabled}></${tag}>`
      },
      'el-slider': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const min = el.min ? `:min='${el.min}'` : ''
        const max = el.max ? `:max='${el.max}'` : ''
        const step = el.step ? `:step='${el.step}'` : ''
        const range = el.range ? 'range' : ''
        const showStops = el['show-stops'] ? `:show-stops="${el['show-stops']}"` : ''
    
        return `<${tag} ${min} ${max} ${step} ${vModel} ${range} ${showStops} ${disabled}></${tag}>`
      },
      'el-time-picker': el => {
        const {
          tag, disabled, vModel, clearable, placeholder, width
        } = attrBuilder(el)
        const startPlaceholder = el['start-placeholder'] ? `start-placeholder="${el['start-placeholder']}"` : ''
        const endPlaceholder = el['end-placeholder'] ? `end-placeholder="${el['end-placeholder']}"` : ''
        const rangeSeparator = el['range-separator'] ? `range-separator="${el['range-separator']}"` : ''
        const isRange = el['is-range'] ? 'is-range' : ''
        const format = el.format ? `format="${el.format}"` : ''
        const valueFormat = el['value-format'] ? `value-format="${el['value-format']}"` : ''
        const pickerOptions = el['picker-options'] ? `:picker-options='${JSON.stringify(el['picker-options'])}'` : ''
    
        return `<${tag} ${vModel} ${isRange} ${format} ${valueFormat} ${pickerOptions} ${width} ${placeholder} ${startPlaceholder} ${endPlaceholder} ${rangeSeparator} ${clearable} ${disabled}></${tag}>`
      },
      'el-date-picker': el => {
        const {
          tag, disabled, vModel, clearable, placeholder, width
        } = attrBuilder(el)
        const startPlaceholder = el['start-placeholder'] ? `start-placeholder="${el['start-placeholder']}"` : ''
        const endPlaceholder = el['end-placeholder'] ? `end-placeholder="${el['end-placeholder']}"` : ''
        const rangeSeparator = el['range-separator'] ? `range-separator="${el['range-separator']}"` : ''
        const format = el.format ? `format="${el.format}"` : ''
        const valueFormat = el['value-format'] ? `value-format="${el['value-format']}"` : ''
        const type = el.type === 'date' ? '' : `type="${el.type}"`
        const readonly = el.readonly ? 'readonly' : ''
    
        return `<${tag} ${type} ${vModel} ${format} ${valueFormat} ${width} ${placeholder} ${startPlaceholder} ${endPlaceholder} ${rangeSeparator} ${clearable} ${readonly} ${disabled}></${tag}>`
      },
      'el-rate': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const max = el.max ? `:max='${el.max}'` : ''
        const allowHalf = el['allow-half'] ? 'allow-half' : ''
        const showText = el['show-text'] ? 'show-text' : ''
        const showScore = el['show-score'] ? 'show-score' : ''
    
        return `<${tag} ${vModel} ${max} ${allowHalf} ${showText} ${showScore} ${disabled}></${tag}>`
      },
      'el-color-picker': el => {
        const { tag, disabled, vModel } = attrBuilder(el)
        const size = `size="${el.size}"`
        const showAlpha = el['show-alpha'] ? 'show-alpha' : ''
        const colorFormat = el['color-format'] ? `color-format="${el['color-format']}"` : ''
    
        return `<${tag} ${vModel} ${size} ${showAlpha} ${colorFormat} ${disabled}></${tag}>`
      },
      'el-upload': el => {
        const { tag } = el.__config__
        const disabled = el.disabled ? ':disabled=\'true\'' : ''
        const action = el.action ? `:action="${el.__vModel__}Action"` : ''
        const multiple = el.multiple ? 'multiple' : ''
        const listType = el['list-type'] !== 'text' ? `list-type="${el['list-type']}"` : ''
        const accept = el.accept ? `accept="${el.accept}"` : ''
        const name = el.name !== 'file' ? `name="${el.name}"` : ''
        const autoUpload = el['auto-upload'] === false ? ':auto-upload="false"' : ''
        const beforeUpload = `:before-upload="${el.__vModel__}BeforeUpload"`
        const fileList = `:file-list="${el.__vModel__}fileList"`
        const ref = `ref="${el.__vModel__}"`
        let child = buildElUploadChild(el)
    
        if (child) child = `\n${child}\n` // 换行
        return `<${tag} ${ref} ${fileList} ${action} ${autoUpload} ${multiple} ${beforeUpload} ${listType} ${accept} ${name} ${disabled}>${child}</${tag}>`
      },
}

// 配置的form-item的属性
function attrBuilder(el) {
    return {
        tag: el.__config__.tag,
        vModel: `v-model="${confGlobal.formModel}.${el.__vModel__}"`,
        clearable: el.clearable ? 'clearable' : '',
        placeholder: el.placeholder ? `placeholder="${el.placeholder}"` : '',
        width: el.style && el.style.width ? ':style="{width: \'100%\'}"' : '',
        disabled: el.disabled ? ':disabled=\'true\'' : ''
    }
}

// el-button 子级
function buildElButtonChild(scheme) {
    const children = []
    const slot = scheme.__slot__ || {}
    if(slot.default) {
        children.push(slot.default)
    }
    return children.join('\n')
}

// el-input子级
function buildElInputChild(scheme) {
    const children = [];
    const slot = scheme.__slot__ || {}
    if(slot && slot.prepend) {
        children.push(`<template slot="prepend">${slot.prepend}</template>`);
    }
    if(slot && slot.append) {
        children.push(`<template slot="append">${slot.prepend}</template>`);
    }
    return children.join('\n')
}

// el-select子级
function buildElSelectChild(scheme) {
    const children = []
    const slot = scheme.__slot__
    if(slot && slot.options && slot.options.length) {
        children.push(`<el-option v-for="(item, index) in ${scheme.__vModel__}Options}" :key="index" :label="item.label" :value="item.value" :disabled="item.disabled"></el-option>`)
    }
    return children.join('\n')
}

// el-radio-group 子级
function buildElRadioGroupChild(scheme) {
    const children = []
    const slot = scheme.__slot__
    const config = scheme.__config__
    if (slot && slot.options && slot.options.length) {
      const tag = config.optionType === 'button' ? 'el-radio-button' : 'el-radio'
      const border = config.border ? 'border' : ''
      children.push(`<${tag} v-for="(item, index) in ${scheme.__vModel__}Options" :key="index" :label="item.value" :disabled="item.disabled" ${border}>{{item.label}}</${tag}>`)
    }
    return children.join('\n')
  }
  
  // el-checkbox-group 子级
  function buildElCheckboxGroupChild(scheme) {
    const children = []
    const slot = scheme.__slot__
    const config = scheme.__config__
    if (slot && slot.options && slot.options.length) {
      const tag = config.optionType === 'button' ? 'el-checkbox-button' : 'el-checkbox'
      const border = config.border ? 'border' : ''
      children.push(`<${tag} v-for="(item, index) in ${scheme.__vModel__}Options" :key="index" :label="item.value" :disabled="item.disabled" ${border}>{{item.label}}</${tag}>`)
    }
    return children.join('\n')
  }
  
  // el-upload 子级
  function buildElUploadChild(scheme) {
    const list = []
    const config = scheme.__config__
    if (scheme['list-type'] === 'picture-card') list.push('<i class="el-icon-plus"></i>')
    else list.push(`<el-button size="small" type="primary" icon="el-icon-upload">${config.buttonText}</el-button>`)
    if (config.showTip) list.push(`<div slot="tip" class="el-upload__tip">只能上传不超过 ${config.fileSize}${config.sizeUnit} 的${scheme.accept}文件</div>`)
    return list.join('\n')
  }

  // span不为24的时候用el-col包裹
  function colWrapper(scheme, str) {
      if(someSpanIsNot24 || scheme.__config__.span !== 24) {
            return `<el-col :span="${scheme.__config__.span}">
                ${str}
            </el-col>`
      }
  }
  

// options配置中有2中类型 一种是col类型 一种是row类型的 所以在layouts中也分两种类型来处理
const layouts = {
    colFormItem(scheme) {
        const config = scheme.__config__;
        let labelWidth = ''
        let label = `label="${config.label}"`
        // 配置的form-item的width和form配置的width不一致 以item配置的为主
        if(config.labelWidth && config.labelWidth !== confGlobal.labelWidth) {
            labelWidth = `label-width="${config.labelWidth}px"`
        }
        // 不显示label的情况处理
        if(config.showLabel === false) {
            labelWidth = 'label-width="0"'
            label = ''
        }
        // 判断是否required
        const required = !ruleTrigger[config.tag] && config.required ? 'required': ''
        // 拼接tag
        const tagDom = tags[config.tag] ? tags[config.tag](scheme) : null;
        // 拼接el-form-item
        let str = `<el-form-item ${labelWidth} ${label} prop="${scheme.__vModel__}" ${required}>
            ${tagDom}           
        </el-form-item>`
        // str = colWrapper(scheme,str)
        return str
    },
    // 行容器 根据具体的功能 该容器可容纳其他容器的作用 然后可以自行设置布局等 该容器不是具体的组件
    // rowFormItem(scheme) {

    // }
}

// 构建弹窗
export function dialogWrapper(str) {
  return `<el-dialog v-bind="$attrs" v-on="$listeners" @open="onOpen" @close="onClose" title="Dialog Titile">
    ${str}
    <div slot="footer">
      <el-button @click="close">取消</el-button>
      <el-button type="primary" @click="handelConfirm">确定</el-button>
    </div>
  </el-dialog>`
}

/**
 *  组装html代码
 * @param {*} formConfig 表单的配置
 * @param {*} type 生成类型,文件或弹窗等
 */
export function makeUpHtml(formConfig, type) {
    const htmlList = [];
    confGlobal = formConfig
    someSpanIsNot24 = formConfig.fields.some(item => item.__config__.span !== 24)
    // 遍历渲染每个组件成html
    formConfig.fields.forEach(el => {
        htmlList.push(layouts[el.__config__.layout](el))
    })
    const htmlStr = htmlList.join('\n')
    
    let temp = buildFormTemplate(formConfig, htmlStr, type)
    // 如果是弹窗类型
    if (type === 'dialog') {
      temp = dialogWrapper(temp)
    }
    confGlobal = null
    return temp

  }